A concrete crack identification trolley

Abstract

The application discloses a concrete crack identification trolley, and belongs to the technical field of concrete crack detection.The trolley comprises an identification assembly, a reinforcing assembly and a fixing assembly.The identification assembly comprises a laser beam emitter and a photoelectric sensor arranged on the bottom of the trolley.The reinforcing assembly comprises a track arranged on the bottom of the trolley, a sliding block arranged on the track, and the photoelectric sensor arranged on the sliding block.The bottom of the trolley is provided with a fixing column, the fixing column is rotatably provided with a reverse element, the reverse element is in transmission connection with the sliding block, and the sliding block drives the reverse element to rotate.The fixing assembly comprises a limiting piece and an unlocking piece.The limiting piece is arranged on the reverse element and is used for fixing the reverse element.The unlocking piece is elastically arranged in the reverse element and is in transmission connection with the limiting piece and the sliding block.The reverse element of the reinforcing assembly is fixed by the fixing assembly, so that the reverse element can be kept stable in the horizontal state and the vertical state, and the reverse element is prevented from shaking when the trolley travels.

Description

Technical Field

[0001] This invention relates to the field of concrete crack detection technology, and in particular to a concrete crack identification vehicle. Background Technology

[0002] Concrete crack identification refers to the detection and identification of cracks on the surface of concrete structures using various technical means. This identification is typically used to assess the health of the concrete structure, determine maintenance and repair needs, and monitor the development of cracks.

[0003] A concrete crack detection vehicle is placed on the surface of a dam and patrols along its length to inspect for cracks. The laser beam emitter and photoelectric sensor are existing technologies and will not be described in detail here. During operation, the laser beam emitter is aimed at the target ground and emits a laser beam. When the laser beam hits a crack on the target surface, part of the laser light is reflected back to the photoelectric sensor. By detecting the intensity and location of the reflected signal, the location and width of the crack can be determined. The photoelectric sensor is sensitive to light; in insufficient light, its measurements may be interfered with. During the measurement process, a reflective sheet is used to enhance laser reflection, thus better capturing the reflected laser signal even in poor lighting conditions. The reflective sheet typically has high reflectivity, which improves measurement accuracy.

[0004] It is important to note that the reflector must be correctly placed at the measurement location to ensure accurate reflected signals. The reflector is typically installed near the target surface and perpendicular to it, not at the location of the photoelectric sensor. This is to enhance the reflected laser signal, thereby improving measurement accuracy and reliability. Therefore, both normal and insufficient lighting conditions must be considered. The reflector cannot be fixed but must be designed to be movable. When lighting is normal, the reflector should be retracted; when lighting is insufficient, it should be deployed. When lighting is normal, only the laser beam emitter and photoelectric sensor need to be fixed to the bottom of the cart, and the laser beam's propagation trajectory is fixed. However, it is now necessary to consider that the reflector needs to be perpendicular to the ground. Therefore, the laser beam reflected by the reflector will inevitably not reach the original location of the photoelectric sensor, and the position of the photoelectric sensor also needs to be adjusted to receive the laser beam reflected by the reflector.

[0005] Therefore, the reflector must have two states: when there is sufficient light, the reflector needs to remain horizontal, and when there is insufficient light, the reflector needs to remain vertical. However, as the car moves, the reflector will inevitably shake. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems mentioned above and / or existing concrete crack identification vehicles, the present invention is proposed.

[0008] Therefore, the problem to be solved by the present invention is how to stabilize the reflector in a horizontal or vertical state.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a concrete crack detection trolley, comprising: a detection component including a laser beam emitter and a photoelectric sensor disposed at the bottom of the trolley; an enhancement component including a track disposed at the bottom of the trolley, a slider slidably mounted on the track, the photoelectric sensor disposed on the slider, a fixed post at the bottom of the trolley, a reflector rotatably mounted on the fixed post, and the reflector being drivenly connected to the slider, the slider driving the reflector to rotate; and a fixing component including a limiting member and an unlocking member, the limiting member being disposed on the reflector and used to fix the reflector; the unlocking member being elastically mounted inside the reflector and being drivenly connected to both the limiting member and the slider.

[0010] In a preferred embodiment of the concrete crack detection trolley of the present invention, the length direction of the track is parallel to the travel direction of the trolley; the slider includes a sliding block, which is slidably connected to the track; the photoelectric sensor is disposed on the sliding block; the track is provided with a clearance groove, which is vertically disposed; a pressure block is disposed on the sliding block; a cylinder is disposed at the bottom of the trolley, which is drively connected to the pressure block; the pressure block is slidably connected to the clearance groove; and the cylinder is adapted to drive the pressure block to move vertically along the length direction of the clearance groove.

[0011] In a preferred embodiment of the concrete crack detection trolley of the present invention, the reinforcing component further includes a transmission bar disposed at the bottom of the trolley, the length direction of the transmission bar being parallel to the length direction of the track, and the transmission bar having teeth; the slider includes a first gear rotatably mounted on the slider block, the first gear meshing with the teeth.

[0012] As a preferred embodiment of the concrete crack identification vehicle of the present invention, the bottom of the vehicle is provided with a first mounting groove, a first transmission column is elastically installed in the first mounting groove, a second mounting groove is provided in the fixed column, a second transmission column is elastically installed in the second mounting groove, and the first transmission column and the second transmission column are connected in a transmission manner.

[0013] In a preferred embodiment of the concrete crack detection trolley of the present invention, the fixed column is provided with a horizontally arranged mounting hole, the central axis of the mounting hole being perpendicular to the length direction of the track; the reflector includes a support column, the support column is provided with a rotating shaft, the rotating shaft passes through the mounting hole, and the rotating shaft is rotatably connected to the mounting hole; the interior of the rotating shaft is hollow and forms a mounting cavity, the outer circumferential wall of the rotating shaft is provided with a through groove, the through groove communicating with the mounting cavity, the second transmission column is adapted to pass through the through groove and extend into the mounting cavity, and the support column is also provided with a reflective sheet.

[0014] In a preferred embodiment of the concrete crack detection trolley of the present invention, the sliding block is provided with a second gear, the rotating shaft is provided with a third gear, the second gear is adapted to mesh with the third gear, and the second gear drives the rotating shaft to rotate.

[0015] In a preferred embodiment of the concrete crack detection trolley of the present invention, the limiting component includes an annular ratchet block, the fixing column is provided with a third mounting groove, and the annular ratchet block is elastically installed in the third mounting groove; the support column is provided with ratchet teeth on one end face near the third mounting groove, and multiple ratchet teeth are provided, which are evenly arranged around the circumference of the third mounting groove, and the ratchet teeth are engaged with the annular ratchet block.

[0016] In a preferred embodiment of the concrete crack detection trolley of the present invention, the unlocking component includes an unlocking rod, which is elastically installed in the mounting cavity. A first wedge-shaped groove is formed on the circumferential wall of the unlocking rod, and the first wedge-shaped groove is arranged around the circumference of the unlocking rod. A second transmission column abuts against the first wedge-shaped groove, and the second transmission column drives the unlocking rod to slide towards the track.

[0017] In a preferred embodiment of the concrete crack detection trolley of the present invention, a locking block is elastically installed on the circumferential wall of the unlocking rod, and a locking groove is also provided on the outer circumferential wall of the rotating shaft. The locking groove is connected to the mounting cavity, and the locking block is adapted to extend out of the locking groove and engage with the locking groove.

[0018] As a preferred embodiment of the concrete crack identification trolley described in this invention, the slider further includes a cam rotatably mounted on the sliding block. The base circle of the cam is located on the central axis of the second gear. The cam includes a first protrusion and a second protrusion, which are centrally symmetrically arranged with respect to the base circle of the cam. Both the first protrusion and the second protrusion are adapted to abut against the locking block. The first protrusion and the second protrusion are used to drive the locking block to retract into the mounting cavity of the rotating shaft.

[0019] The beneficial effects of this invention are as follows: by fixing the reflector of the added component with the fixing component, the reflector can remain stable in both horizontal and vertical states; when the reflector is not used, the reflector can remain horizontal, and when the reflector is used, the reflector can remain vertical, thus preventing the reflector from shaking when the trolley is moving. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a diagram showing the working status of the concrete crack detection vehicle under normal conditions.

[0022] Figure 2 A partial structural diagram of the reinforcement components of the vehicle used for identifying concrete cracks.

[0023] Figure 3 Parts assembly diagram of the trolley used to identify concrete cracks.

[0024] Figure 4 A diagram showing the component relationships of a trolley used to identify concrete cracks.

[0025] Figure 5 A partial cross-sectional view of the trolley used to identify concrete cracks.

[0026] Figure 6 A structural diagram of the fixed column of the trolley used to identify concrete cracks. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0030] Example 1

[0031] See Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a concrete crack detection vehicle, including: a detection component 100, a reinforcement component 200, and a fixing component 300; the detection component 100 is used to detect concrete cracks; the reinforcement component 200 is used to improve the detection effect in poor lighting conditions; and the fixing component 300 is used to limit the position of the reinforcement component 200.

[0032] Specifically, the identification component 100 includes a laser beam emitter 101 and a photoelectric sensor 102. Both the laser beam emitter 101 and the photoelectric sensor 102 are located at the bottom of the vehicle, and the line connecting the laser beam emitter 101 and the photoelectric sensor 102 is parallel to the direction of travel of the vehicle.

[0033] Preferably, the reinforcing component 200 includes a track 201, which is disposed at the bottom of the trolley. The length direction of the track 201 is parallel to the travel direction of the trolley. A slider 202 is slidably mounted on the track 201 and can slide along the length direction of the track 201. A photoelectric sensor 102 is disposed on the slider 202 and can drive the photoelectric sensor 102 to move synchronously when the slider 202 slides. A fixed post 203 is provided at the bottom of the trolley, and a reflector 204 is rotatably mounted on the fixed post 203. The reflector 204 is connected to the slider 202 in a transmission manner, and the slider 202 can drive the reflector 204 to rotate.

[0034] Furthermore, the fixing component 300 includes a limiting member 301 and an unlocking member 302. The limiting member 301 is disposed on the reflector 204 and is used to fix the reflector 204. The unlocking member 302 is elastically installed in the reflector 204 and is connected to both the limiting member 301 and the slider member 202 in a transmission manner. In use, the slider member 202 is used to adjust the working state of the unlocking member 302, and the limiting member 301 is used to keep the reflector 204 in a horizontal or vertical state.

[0035] Example 2

[0036] Reference Figures 1-6 This is the second embodiment of the present invention, which is based on embodiment 1.

[0037] Specifically, the length direction of the track 201 is parallel to the travel direction of the trolley, and a groove is formed on the side wall of the track 201, the length direction of which is parallel to the length direction of the track 201; the slider 202 includes a slider block 202a, which is slidably connected to the track 201 and can slide along the length direction of the track 201; the photoelectric sensor 102 is disposed on the slider block 202a, and when the slider block 202a slides, it can drive the photoelectric sensor 102 to move synchronously, thereby adjusting the position of the photoelectric sensor 102. The track 201 is provided with a clearance groove, which is vertically set and connected to the sliding groove. The sliding block 202a is provided with a pressure block 202b, and the bottom of the trolley is provided with a cylinder 202c. The cylinder 202c is connected to the pressure block 202b in a driving connection, and the pressure block 202b is slidably connected to the clearance groove. The sliding block 202a slides on the track 201. When the pressure block 202b is located at the connection between the clearance groove and the sliding groove, the sliding block 202a stops sliding. At this time, the cylinder 202c does work and drives the pressure block 202b to move vertically along the length of the clearance groove.

[0038] Preferably, the reinforcing component 200 further includes a transmission bar 205, which is disposed at the bottom of the trolley. The length direction of the transmission bar 205 is parallel to the length direction of the track 201, and the transmission bar 205 is provided with teeth 205a. The slider component 202 includes a drive shaft, which is rotatably mounted on the slider block 202a. The axial direction of the drive shaft is perpendicular to the sliding direction of the slider block 202a. The drive shaft is provided with a first gear 202d, which meshes with the teeth 205a. The slider block 202a is provided with a motor (not shown in the figure), which is connected to the drive shaft. The motor drives the first gear 202d to rotate through the drive shaft. Since the first gear 202d meshes with the teeth 205a of the transmission bar 205, when the first gear 202d rotates, it will drive the slider block 202a to slide along the length direction of the track 201.

[0039] Preferably, the bottom of the trolley is provided with a first mounting groove, which is horizontally arranged and connected to a clearance groove. A first transmission column 207 is elastically installed in the first mounting groove. A second mounting groove 203a is vertically arranged in the fixed column 203, which is connected to the first mounting groove. A second transmission column 203b is elastically installed in the second mounting groove 203a. The first transmission column 207 and the second transmission column 203b are connected in a transmission manner. The pressure block 202b on the sliding block 202a is abutted against the first transmission column 207 by the action of the cylinder 202c, and the pressure block 202b drives the first transmission column 207 to slide in the first mounting groove. The first transmission column 207 drives the second transmission column 203b to slide in the second mounting groove 203a.

[0040] Preferably, the fixed column 203 is provided with a horizontally arranged mounting hole 203c, the central axis of which is perpendicular to the length direction of the track 201. The mounting hole 203c passes through the left and right end faces of the fixed column 203, and the second mounting groove 203a is connected to the mounting hole 203c. The reflector 204 includes a support column 204a, on which a rotating shaft 204b is provided. The rotating shaft 204b passes through the mounting hole 203c and is rotatably connected to the mounting hole 203c. The interior of the rotating shaft 204b is hollow and forms a mounting cavity 204c. A through groove 204d is provided on the outer circumferential wall of the rotating shaft 204b, which is connected to the mounting cavity 204c. When the rotating shaft 204b is installed in the mounting hole 203c, the second transmission column 203b can pass through the through groove 204d and extend into the mounting cavity 204c. The support column 204a is also provided with a reflector sheet 204e.

[0041] Preferably, a second gear 202e is rotatably mounted on the pressure block 202b on the sliding block 202a, and a third gear 204f is provided on the rotating shaft 204b. When the cylinder 202c pushes the sliding block 202a to move upward, the second gear 202e can mesh with the third gear 204f, and the second gear 202e drives the rotating shaft 204b to rotate.

[0042] Preferably, the limiting member 301 includes an annular ratchet block 301a, and the fixing post 203 is provided with a third mounting groove 301b. The third mounting groove 301b is annular, and the central axis of the third mounting groove 301b coincides with the central axis of the mounting hole 203c. The annular ratchet block 301a is elastically installed in the third mounting groove 301b. The end face of the support post 204a near the third mounting groove 301b is provided with ratchet teeth 301c. Multiple ratchet teeth 301c are provided and are evenly arranged around the circumference of the third mounting groove 301b. The ratchet teeth 301c engage with the annular ratchet block 301a. The cooperation between the ratchet teeth 301c and the annular ratchet block 301a can keep the support post 204a of the reflector 204 in a horizontal or vertical state.

[0043] Preferably, the unlocking component 302 includes an unlocking rod 302a, which is elastically installed in the mounting cavity 204c. The unlocking rod 302a can slide left and right along the axial direction of the mounting cavity 204c. Under the action of elastic force, the unlocking rod 302a tends to move to the left, and the left end of the unlocking rod 302a abuts against the annular ratchet block 301a. When the unlocking rod 302a moves to the right, it also drives the annular ratchet block 301a to move to the right. A first wedge-shaped groove 302b is formed on the circumferential wall of the unlocking rod 302a, and the first wedge-shaped groove 302b surrounds the unlocking rod 302a. In the circumferential direction setting of 2a, the position of the first wedge groove 302b on the unlocking rod 302a corresponds to the position of the through groove 204d on the rotating shaft 204b. The bottom of the second transmission column 203b abuts against the first wedge groove 302b. When the second drive column moves downward, the second transmission column 203b drives the unlocking rod 302a to slide towards the track 201, that is, to move to the right. At this time, the unlocking rod 302a drives the annular ratchet block 301a to move to the right. If the support column 204a rotates at this time, the annular ratchet block 301a will not hinder the rotation of the support column 204a.

[0044] Preferably, a locking block 302c is elastically installed on the circumferential wall of the unlocking rod 302a, and a locking groove 302d is also provided on the outer circumferential wall of the rotating shaft 204b. The locking groove 302d is connected to the mounting cavity 204c. When the unlocking rod 302a moves to the right, the locking block 302c on the unlocking rod 302a can extend out of the locking groove 302d and engage with the locking groove 302d. At this time, the unlocking rod 302a will not continue to move to the right, nor will it reset to the left. At this time, the second gear 202e drives the support column 204a to rotate to a vertical state through the cooperation of the third gear 204f.

[0045] Furthermore, the slider 202 also includes a cam 202f rotatably mounted on the slider block 202a. The base circle center of the cam 202f is located on the central axis of the second gear 202e. The cam 202f includes a first protrusion 202f-1 and a second protrusion 202f-2. The first protrusion 202f-1 and the second protrusion 202f-2 are centrally symmetrically arranged with respect to the base circle center of the cam 202f. Both the first protrusion 202f-1 and the second protrusion 202f-2 are adapted to abut against the locking block 302c. The first protrusion 202f-1 and... The second protrusion 202f-2 is used to drive the locking block 302c to retract into the mounting cavity 204c of the rotating shaft 204b. During the process of the support column 204a rotating 90°, the highest point of the first protrusion 202f-1 gradually contacts the locking block 302c. That is, after the rotating shaft 204b rotates 90°, the first protrusion 202f-1 will push the locking block 302c back into the rotating shaft 204b, thereby resetting the unlocking rod 302a to the left. The unlocking rod 302a drives the annular ratchet block 301a to re-engage, so that the support column 204a is fixed in a vertical state.

[0046] To facilitate understanding of the technical solution of the concrete crack detection vehicle of the present invention, its usage process is briefly described below:

[0047] In the initial state: the annular ratchet block 301a is engaged with the ratchet tooth 301c, and the support column 204a remains horizontal;

[0048] When the light is insufficient, the sliding block 202a slides on the track 201. When the pressure block 202b is located at the connection between the clearance groove and the sliding groove, the sliding block 202a stops sliding. At this time, the cylinder 202c performs work, driving the pressure block 202b to move upward. This drives the unlocking rod 302a to move to the right through the first transmission column 207 and the second transmission column 203b in sequence. The annular ratchet block 301a disengages from the ratchet tooth 301c, and the locking block 302c on the unlocking rod 302a can extend out of the locking groove 302d and engage with it. At this time, the unlocking rod 302a will not continue to move to the right, nor will it reset to the left. At this time, the second gear 202e is in operation. Through its interaction with the third gear 204f, the support column 204a is rotated to a vertical position. As the support column 204a rotates 90°, the highest point of the first protrusion 202f-1 gradually contacts the locking block 302c. That is, after the support column 204a rotates 90°, the first protrusion 202f-1 will push the locking block 302c back into the rotating shaft 204b, thereby resetting the unlocking rod 302a to the left. The unlocking rod 302a drives the annular ratchet block 301a to re-engage, fixing the support column 204a in a vertical position. Subsequently, the cylinder 202c drives the sliding block 202a to descend, and the motor drives the sliding block 202a to continue sliding to the predetermined position.

[0049] Reset: After the identification process is completed, the motor drives the sliding block 202a to slide in the reverse direction. When the pressure block 202b is located at the connection between the clearance groove and the slide groove, the sliding block 202a stops sliding. At this time, the cylinder 202c performs work, driving the pressure block 202b to move upward. This, in turn, drives the unlocking rod 302a to move to the right via the first transmission column 207 and the second transmission column 203b. The annular ratchet block 301a disengages from the ratchet tooth 301c, and the locking block 302c on the unlocking rod 302a can extend out of the locking groove 302d and engage with it. At this time, the unlocking rod 302a will not continue to move to the right, nor will it reset to the left. Furthermore, the second gear 202e, through its interaction with... The third gear 204f engages to rotate the support column 204a in the opposite direction to a horizontal state. As the support column 204a rotates 90° in the opposite direction, the highest point of the second protrusion 202f-2 gradually contacts the locking block 302c. That is, after the support column 204a rotates 90° in the opposite direction, the second protrusion 202f-2 will push the locking block 302c back into the rotating shaft 204b, thereby resetting the unlocking rod 302a to the left. The unlocking rod 302a drives the annular ratchet block 301a to re-engage, fixing the support column 204a in a horizontal state. Subsequently, the cylinder 202c drives the sliding block 202a to descend, and the motor drives the sliding block 202a to continue sliding and resetting.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A concrete crack detection vehicle, characterized in that, include: The identification component (100) includes a laser beam emitter (101) and a photoelectric sensor (102) disposed at the bottom of the vehicle. The enhancement component (200) includes a track (201) disposed at the bottom of the trolley, a slider (202) slidably mounted on the track (201), a photoelectric sensor (102) disposed on the slider (202), a fixed post (203) disposed at the bottom of the trolley, a reflector (204) rotatably mounted on the fixed post (203), and the reflector (204) being connected to the slider (202) in a transmission manner, the slider (202) driving the reflector (204) to rotate; The fixing component (300) includes a limiting member (301) and an unlocking member (302). The limiting member (301) is disposed on the reflector (204) and is used to fix the reflector (204). The unlocking member (302) is elastically installed in the reflector (204) and is simultaneously connected to the limiting member (301) and the slider (202). The bottom of the trolley is provided with a first mounting groove, in which a first transmission column (207) is elastically installed. The fixed column (203) is provided with a second mounting groove (203a), in which a second transmission column (203b) is elastically installed. The first transmission column (207) and the second transmission column (203b) are connected in a transmission manner. The fixed column (203) is provided with a horizontally arranged mounting hole (203c), the central axis of which is perpendicular to the length direction of the track (201); the reflector (204) includes a support column (204a), on which a rotating shaft (204b) is provided, the rotating shaft (204b) passing through the mounting hole (203c) and being rotatably connected to the mounting hole (203c); the interior of the rotating shaft (204b) is hollow and forms a mounting cavity (204c), and a through groove (204d) is provided on the outer circumferential wall of the rotating shaft (204b), the through groove (204d) communicating with the mounting cavity (204c); the second transmission column (203b) is adapted to pass through the through groove (204d) and extend into the mounting cavity (204c); the support column (204a) is also provided with a reflector sheet (204e). The limiting member (301) includes an annular ratchet block (301a), and the fixing post (203) is provided with a third mounting groove (301b). The annular ratchet block (301a) is elastically installed in the third mounting groove (301b). The support post (204a) has ratchet teeth (301c) on one end face near the third mounting groove (301b). There are multiple ratchet teeth (301c), and the multiple ratchet teeth (301c) are evenly arranged around the circumference of the third mounting groove (301b). The ratchet teeth (301c) are engaged with the annular ratchet block (301a). The unlocking component (302) includes an unlocking rod (302a), which is elastically installed in the mounting cavity (204c). A first wedge-shaped groove (302b) is provided on the circumferential wall of the unlocking rod (302a). The first wedge-shaped groove (302b) is arranged around the circumference of the unlocking rod (302a). A second transmission column (203b) abuts against the first wedge-shaped groove (302b). The second transmission column (203b) drives the unlocking rod (302a) to slide towards the track (201).

2. The concrete crack detection vehicle as described in claim 1, characterized in that, The length direction of the track (201) is parallel to the travel direction of the trolley; the slider (202) includes a slider block (202a), which is slidably connected to the track (201), and the photoelectric sensor (102) is disposed on the slider block (202a). The track (201) is provided with a clearance groove, which is vertically disposed; a pressure block (202b) is disposed on the slider block (202a), and a cylinder (202c) is disposed at the bottom of the trolley. The cylinder (202c) is induced to be connected to the pressure block (202b), and the pressure block (202b) is slidably connected to the clearance groove. The cylinder (202c) is adapted to drive the pressure block (202b) to move vertically along the length direction of the clearance groove.

3. The concrete crack detection vehicle as described in claim 2, characterized in that, The reinforcing component (200) further includes a transmission bar (205) disposed at the bottom of the trolley, the length direction of the transmission bar (205) being parallel to the length direction of the track (201), and the transmission bar (205) having teeth (205a); the slider (202) includes a first gear (202d) rotatably mounted on the slider block (202a), the first gear (202d) meshing with the teeth (205a).

4. The concrete crack detection vehicle as described in claim 3, characterized in that, The sliding block (202a) is provided with a second gear (202e), and the rotating shaft (204b) is provided with a third gear (204f). The second gear (202e) is adapted to mesh with the third gear (204f), and the second gear (202e) drives the rotating shaft (204b) to rotate.

5. The concrete crack detection vehicle as described in claim 4, characterized in that, A locking block (302c) is elastically installed on the circumferential wall of the unlocking rod (302a), and a locking groove (302d) is also provided on the outer circumferential wall of the rotating shaft (204b). The locking groove (302d) is connected to the mounting cavity (204c), and the locking block (302c) is adapted to extend out of the locking groove (302d) and engage with the locking groove (302d).

6. The concrete crack detection vehicle as described in claim 5, characterized in that, The slider (202) further includes a cam (202f) rotatably mounted on the slider (202a). The center of the base circle of the cam (202f) is located on the central axis of the second gear (202e). The cam (202f) includes a first protrusion (202f-1) and a second protrusion (202f-2). The first protrusion (202f-1) and the second protrusion (202f-2) are centrally symmetrically arranged with respect to the center of the base circle of the cam (202f). The first protrusion (202f-1) and the second protrusion (202f-2) are both adapted to abut against the locking block (302c). The first protrusion (202f-1) and the second protrusion (202f-2) are used to drive the locking block (302c) to retract into the mounting cavity (204c) of the rotating shaft (204b).

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